Lemuel bannister



(No Model.)

L. BANNISTER.

GRATE. No. 261,898. Patented Aug. 1, 1882.

N. PETERS, PboloJ-ilhcgnphar. Walkingion. o c.

UNIT D STATES PATENT OFFICE.

LEMUEL BANNISTER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THEAMERICAN GRATE BAR COMPANY, OF SAME PLACE.

GRATE.

SPECIFICATION formingpart of Letters Patent No. 261,898, dated August 1,1882,

Application filed June 2, 1882. (No model.)

To all whom it may concern:

Be it known that I, LEMUEL BANNISTER, a citizen of the United States,and a resident of Philadelphia, in thecounty of Philadelphia and Stateof Pennsylvania, have invented certain new and useful Improvements inGrates, of which the following is a specification.

My invention relates to that class of gratessuch, for instance, as isillustrated in Letters Patent Nos. 180,616, 193,018, and 213,228,granted to G. B. Mershon-in which a series of bars is rocked in bearingsby means of a lever at the front or side of the grate; and my inventionconsists in constructing the lever and attachments, as fully describedhereinafter, so as to permit it to be readily applied and operated toimpart a more extended motion than heretofore to the bars.

In the drawings, Figure 1 is a front view of part of a furnace, showingthe bar-rocking attachment partly in section. Fig. 2 is a side view ofFig. 1. Figs. 3, 4, 5, and 6 are views showing modifications.

My improvement is applicable to grates in which the bars have eithercrank-arms or pinions at their forward ends, the motion to be impartedto the bars being the same as in the grates described in the aforesaidpatents, and with like effect.

I have shown the bars A as having crankarms B, which may all beconnected to one transverse bar,0,so that movement imparted to one barwill be transmitted to all; but I contemplate dividing theconnecting-bar into sections, so that in large grates the bars A may beconnected in gangs rockingindependently of each other. The bars arerocked by means of a lever, D, which may be slot-ted, as shown in Figs.1, 3, so as to receive a fulcrum-pin, a, extending across an opening,to, in a flange, b, of the frame X, this flange projecting forward belowthe feed-door in a furnace or stove, or being about level with the floorin case of an open grate. The lower end of the lever D is also slottedto receive or embrace one of the crank-pins, d, connecting the arms Bwith the bar-O, so that upon vibrating the lever on its fulcrum thecrank-arm will 'be swung, communicating motion to all the oththe fulcraof the arm and lever.

ers of the grate or gang, the slot in the end of the lever permittingthe vertical play of the pin 61 resulting from the different positionsof The same result may be secured by making an opening in the lower endof the lever to receive the end or shank of the crank-pin, as in Fig. 4,or allowing the lever to slide vertically on its pivot 01, as in Fig. 3;or in this case the pin a may be dispensed with,the leverslidingin theopening an; or the lever may be hung to a link, t, Fig. 5, so as topermit it to move vertically whilevibrating. Bythedifierentarraugementof the fulcra of the lever and crank-arms I am enabled to secure a moreextended rocking movement of said arms, so as to revolve the bars to agreater degree without imparting so extended a vibration to the upperend of the lever.

Where the bars are geared together, as in Letters Patent N o. 180,616,Iprovide each pinion with a crank-pin, to which the lower end of thelever is applied, as above described.

The connection of the lever with the crankpin may be permanent; or, asdescribed,it may be such as to permit the detaching of the lever, thelatter being preferable, form such case the same lever may be used tomove separate bars or separate gangs of bars by providing the frame witha series of fulcra, a, Fig. 1, either in the shape of pins or ofopenings or notches in the flange b. The lever may then be applied toany one of the arms having a fulcrum above it.

In some cases the lever is madein two parts, thus one portion, h,slotted to receive the crank-pins at the lower end, may be provided withtrunnions i, fitting detachably hearings in the flange b, and with asocket, w, to receive the end of the other part, h, which may be readilyapplied to and removed from the section h. This secures the differentarrangement of fulcra as shown in the constructions before described,and is of special advantage in some applications. If desired, thesection It may be permanently attached to rock in its bearings.

Without limiting myself to the precise construction of parts shown, Iclaim I 1. The combination, with the rock-bars A,

provided with crank-arms or wheels having pins d, of a rock-leveradapted to be connected at one end to one of said pins, and having afulcrum at a point above the axis of the bars, substantially as setforth.

2. The combination of the bars, arms having pins d, and lever D, adaptedto afulcrum above the axis of the grate-bar to have a vertical as Wellas a swinging movement, substantially as and for the purposes set forth.

3. The combination, in a grate, of the rocking bars having crank-arms,and a frame constructed to afford a series of fulcra for the detachablelever D, substantially as set forth.

4. The combination ofthe bars having cran karms, and the flange I),having one or more fulcrum-openings to receive the lever D,substantially-as set forth;

5. The combination, with the bars and arms, of a lever in two sections,one having its ful- 2o crnm above the axis of the bars and connected toone of the crank-pins, and the other being fitted detachably to thelower section, substantially as specified.

In testimony whereof I have signed my name 25 to this specification inthe presence of two subscribing witnesses.

LEMUE L BANNISTER.

Witnesses O. H. WILLIAMSON, CHAS. E. HENRY.

